name: Publish Docker image

on:
  push:
    branches:
      - main
    paths-ignore:
      - './**/*.md'
      - 'LICENSE'
  release:
    types:
      - created

env:
  GITHUB_REF_NAME: ${{ github.event.release.tag_name }}
  IMAGE_NAME: cdalvaro/docker-salt-master
  PLATFORMS: linux/amd64,linux/arm64,linux/arm/v7
  CACHE_PATH: /tmp/.buildx-docker-salt-master-cache
  EXTRA_REGISTRIES: ghcr.io quay.io

jobs:
  publish:
    name: Publish
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Cache Docker layers
        uses: actions/cache@v2.1.4
        with:
          path: ${{ env.CACHE_PATH }}
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      - name: Login to Docker Container Registry
        uses: docker/login-action@v1
        with:
          username: ${{ github.repository_owner }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.CR_PAT }}

      - name: Login to Quay.io Container Registry
        uses: docker/login-action@v1
        with:
          registry: quay.io
          username: ${{ secrets.QUAYIO_USERNAME }}
          password: ${{ secrets.QUAYIO_PASSWORD }}

      - name: Prepare metadata
        id: metadata
        run: |
          # Tags
          DOCKER_IMAGE="${IMAGE_NAME}:${GITHUB_REF_NAME:-latest}"
          TAGS="${DOCKER_IMAGE}"
          for registry in ${EXTRA_REGISTRIES}; do
            TAGS="${TAGS},${registry}/${DOCKER_IMAGE}"
          done

          # Build args
          VCS_REF="${GITHUB_SHA::8}"
          CREATED_ON="$(date +"%Y-%m-%d %H:%M:%S%:z")"

          echo ::set-output name=tags::${TAGS}
          echo ::set-output name=vcs_ref::${VCS_REF}
          echo ::set-output name=created_on::${CREATED_ON}

      - name: Build
        uses: docker/build-push-action@v2
        with:
          context: .
          file: ./Dockerfile
          platforms: ${{ env.PLATFORMS }}
          build-args: |
            VCS_REF=${{ steps.metadata.outputs.vcs_ref }}
            BUILD_DATE=${{ steps.metadata.outputs.created_on }}
          cache-from: type=local,src=${{ env.CACHE_PATH }}
          cache-to: type=local,dest=${{ env.CACHE_PATH }}
          push: true
          tags: ${{ steps.metadata.outputs.tags }}